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Two different methods of synthesis of TiO 2 /WO 3  heterostructures were carried out with the aim to increase photocatalytic activity. In this study, anodic TiO 2  nanotube films were synthesized by electrochemical anodization of titanium foil. WO 3  particles were applied to anodic Ti/TiO 2  samples in two different ways – by electrophoretic deposition (EPD) and insertion during the anodization process. Structural and photocatalytic properties were compared between pristine TiO 2  and TiO 2  with incorporated WO 3  particles. Raman mapping was used to character-ise the uniformity of EPD WO 3  coating and to determine the structural composition. The study showed that deposition of WO 3  onto TiO 2  nanotube layer lowered the band gap of the binary system compared to pristine TiO 2  and WO 3  influence on photo-electrochemical properties of titania. The addition of WO 3  increased charge carrier dynamics but did not increase the measured photo-current response. As the WO 3  undergoes a phase transition from monoclinic to orthorhombic at approximately 320 ℃ proper sequence WO 3  deposition could be beneficial. It was observed that secondary heat treatment of WO 3  lowers the photocurrent.

WO3 as Additive for Efficient Photocatalyst Binary System TiO2/WO3

WO₃ as Additive for Efficient Photocatalyst Binary System TiO₂/WO₃